This is downright hilarious. With software applications, vendors can hide behind the DMCA's provisions of "thou shalt not circumvent DRM."
One cannot copyright CPUs; their IP is protected through patent alone.
Hence, Intel will have absolutely zero recourse against people that "unlock" the CPUs. According to US intellectual property law, it is 100% the right of the user thanks to the century-old and perfectly-established "First Sale Doctrine." Once you buy a patented device, what you do with it specifically is entirely up to you; the designer/maker/seller has zero legal grounds to dictate anything. Their only recourse is through their control over other services, such as warranties or subscription programs. (Xbox Live is a prime example)
So yes, with this, expect to see "unlock codes" or "CPU cracks" to start showing up. They'll be distributed for free, and the best part will be:
they will be 100% legal. So there won't be any takedowns, because DMCA only protects COPYRIGHTED work; that's the 'C' part; it's not the Digital Millenium Patent Act.
What's interesting will be to see what Intel does to respond. Sure, there'll still be the entirely un-savvy people who will be fooled by Intel's scheme, (which while legal, is still kind of a scam) and will fork over $50 for something that is theirs if they only had the expertise for. (after all, there are still people who think that you can download RAM) Only applying this to non-enthusiast OEM machines can help focus on these less-knowledgeable people. But now they'll have to contend with the enthusiast crowd that will be paying the lesser price for the full product.
Intel could basically try two different things: they COULD raise the base price, (potentially lowering the "upgrade" costs) to price it closer to a CPU that already is "unlocked" anyway. Or they could simply stop the idea alltogether, and fire the guy that got such a poor idea. However, it's still possible that Intel could do neither; after all, Intel still blithely charges ahead with their Pentium and Celeron chips priced where they are, in spite the fact that AMD's Athlon IIs beat the ever-loving snot out of them for price-performance; $100 COULD get you a
Pentium 6950... Or it could get you an
Athlon II X4 635, with slightly better per-core performance... And four physical cores. Or the fabled
Phenom II X3 740 Black Edition, with more per-core power, an extra core, and famed overclock/unlockability power. So yeah, it's quite possible Intel will just blindly pretend everything's all right, since they've been trying to sell badly hacked-down Core 2s to compete with AMD CPUs that compare with the non-hacked-down Core 2s.